CN114801346A - 一次性降解复合布及其制备方法 - Google Patents
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Abstract
本发明涉及一种一次性降解复合布,其为22~26g/m2本白降解膜以及与所述本白降解膜胶复合的30g/m2白降解无纺布。所述本白降解膜由全降解原料TA‑1102经双层共挤流延制得。本发明还涉及上述一次性降解复合布的制备方法。本发明的一次性降解复合布可降解且不会形成白色污染。
Description
技术领域
本发明涉及一种一次性降解复合布及其制备方法。
背景技术
聚乳酸(PLA)是一种新型的生物降解材料,使用可再生的植物资源(如玉米)所提出的淀粉原料制成,其具有良好的生物可降解性,使用后能被自然界中微生物完全降解,最终生成二氧化碳和水,不污染环境,这对保护环境非常有利,是公认的环境友好材料。
普通塑料的处理方法依然是焚烧火化,造成大量温室气体排入空气中,而聚乳酸塑料则是掩埋在土壤里降解,产生的二氧化碳直接进入土壤有机质或被植物吸收,不会排入空气中,不会造成温室效应。
现有医用隔离降解复合布通常是通过加快自然老化实现分解,属于氧化分解,降解周期较长。而聚乳酸由于通常缺乏韧性,耐冲击性、耐撕裂性以及柔软性低,成为使用中的一大弊端。
发明内容
本发明的目的是提供一种可降解且不会形成白色污染的一次性降解复合布及其制备方法。
本发明采用如下技术方案:
一种一次性降解复合布,其为22~26g/m2本白降解膜以及与所述本白降解膜胶复合的30g/m2白降解无纺布。
进一步的,所述本白降解膜由全降解原料TA-1102经双层共挤流延制得。
进一步的,所述本白降解膜通过如下方法制备:
(1)全降解原料TA-1102在170~190℃的温度塑化;
(2)将塑化后的材料经T型模头在180~200℃的温度下双层共挤挤出;
(3)通过光辊与液体硅胶辊对挤出的降解膜进行热压、冷却和定型,制得22~26g/m2本白降解膜。
进一步的,所述步骤(1)的塑化温度为180℃。
进一步的,所述步骤(2)中T型180℃模头的1区~11区温度为190℃。
进一步的,所述步骤(3)中液体硅胶辊压力为2~4MPa。
一种上述一次性降解复合布的制备方法,其包括如下步骤:
(a)将22~26g/m2本白降解膜以及30g/m2白降解无纺布输入喷胶机;
(b)喷胶机按照2.5g/m2的喷胶量喷胶后,将本白降解膜和白降解无纺布胶复合在一起,得到一次性降解复合布。
制备方法中,所述喷胶机的预热区温度为140℃。
制备方法中,所述喷胶机的胶枪区温度为175℃。
制备方法中,所述喷胶机的主牵引辊压力为0.4~1.0MPa,辅牵引辊压力为0.1~0.8MPa。
本发明的有益效果在于:本发明的一次性降解复合布在自然界中的微生物(细菌、真菌等)作用下,通过生物代谢过程而发生降解,最终产物为二氧化碳、水和其他对环境无害的小分子物质,克服了单独使用PLA的弊端,兼顾了强度和降解性。
具体实施方式
下面将结合本申请实施例对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。
实施例1
利用贴合机生产本白降解膜,贴合机型号为SJLM-Z90/110-2300,购自新乐华宝塑料机械有限公司。
(1)全降解原料TA-1102购自广州炬晶新材料有限公司,原料如下温度塑化;
设定B机1区140℃,2区150℃,3区160℃,4区170℃,5区170℃。设定对应饲料机1区140℃,2区150℃,3区160℃,4区160℃。
(2)将塑化后的材料经T型模头在180~200℃的温度下双层共挤挤出;模头1区~11区温度设定为180℃,分配器温度为170℃。
(3)通过光辊与液体硅胶辊对挤出的降解膜进行热压、冷却和定型,制得22g/m2本白降解膜。
(4)将22g/m2本白降解膜以及30g/m2白降解无纺布输入喷胶机;喷胶机型号为H205-00,购自常州凯讯机械。白降解无纺布型号为30g/m2,购自温州超城。
(5)喷胶机按照2.5g/m2的喷胶量喷胶(TEP903胶)后,将本白降解膜和白降解无纺布胶复合在一起,得到一次性降解复合布。
喷胶机参数具体为:
预热区:1区~3区130℃。熔缸区:1区~2区145℃。喉管区:1区~8区160℃。辅域区:1区~8区155℃。胶枪区:1区~8区165℃。
电磁阀压力0.25MPa。热风压力0.05MPa。主牵引辊压力0.4MPa。辅牵引辊压力0.1MPa。
实施例2
利用贴合机生产本白降解膜,贴合机型号为SJLM-Z90/110-2300,购自新乐华宝医疗用品有限公司。
(1)全降解原料TA-1102购自广州炬晶新材料有限公司,原料经如下温度塑化;
设定B机1区150℃,2区160℃,3区170℃,4区180℃,5区180℃。设定对应饲料机1区150℃,2区160℃,3区170℃,4区170℃。
(2)将塑化后的材料经T型模头在180~200℃的温度下双层共挤挤出;模头1区~11区温度设定为190℃,分配器温度为180℃。
(3)通过光辊与液体硅胶辊对挤出的降解膜进行热压、冷却和定型,制得24g/m2本白降解膜。
(4)将24g/m2本白降解膜以及30g/m2白降解无纺布输入喷胶机;喷胶机型号为H205-00,购自常州凯讯机械。白降解无纺布型号为30g/m2,购自温州超城。
(5)喷胶机按照2.5g/m2的喷胶量喷胶(TEP903胶)后,将本白降解膜和白降解无纺布胶复合在一起,得到一次性降解复合布。
喷胶机参数具体为:
预热区:1区~3区140℃。熔缸区:1区~2区155℃。喉管区:1区~8区170℃。辅域区:1区~8区165℃。胶枪区:1区~8区175℃。
电磁阀压力0.55MPa。热风压力0.35MPa。主牵引辊压力0.7MPa。辅牵引辊压力0.4MPa。
实施例3
利用贴合机生产本白降解膜,贴合机型号为SJLM-Z90/110-2300,购自新乐华宝医疗用品有限公司。
(1)全降解原料TA-1102购自广州炬晶新材料有限公司,原料经170~190℃的温度塑化;
设定B机1区160℃,2区170℃,3区180℃,4区190℃,5区190℃。设定对应饲料机1区160℃,2区170℃,3区180℃,4区180℃。
(2)将塑化后的材料经T型模头在180~200℃的温度下双层共挤挤出;模头1区~11区温度设定为200℃,分配器温度为190℃。
(3)通过光辊与液体硅胶辊对挤出的降解膜进行热压、冷却和定型,制得26g/m2本白降解膜。
(4)将26g/m2本白降解膜以及30g/m2白降解无纺布输入喷胶机;喷胶机型号为H205-00,购自常州凯讯机械。白降解无纺布型号为30g/m2,购自温州超城。
(5)喷胶机按照2.5g/m2的喷胶量喷胶(TEP903胶)后,将本白降解膜和白降解无纺布胶复合在一起,得到一次性降解复合布。
喷胶机参数具体为:
预热区:1区~3区150℃。熔缸区:1区~2区165℃。喉管区:1区~8区180℃。辅域区:1区~8区175℃。胶枪区:1区~8区185℃。
电磁阀压力0.85MPa。热风压力0.65MPa。主牵引辊压力1.0MPa。辅牵引辊压力0.7MPa。
效果例
全降解原料TA-1102归属于PLA(聚乳酸),分子结构中的酯键易水解,能在人体内或土壤中经微生物的作用降解生成乳酸,进一步降解使低聚物水解为小分子。白降解无纺布也属于易降解材料,同时兼顾韧性、柔软性和强度。实施例1~3的拉力>35N,伸长率>180%,静水压>1500mmH2O,自然降解时间<90天(GB/T 19277.1-2011)。
以上对至少一个示例性实施例的描述实际上仅仅是说明性的,决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
Claims (10)
1.一种一次性降解复合布,其特征在于,其为22~26g/m2本白降解膜以及与所述本白降解膜胶复合的30g/m2白降解无纺布。
2.根据权利要求1所述的一种一次性降解复合布,其特征在于,所述本白降解膜由全降解原料TA-1102经双层共挤流延制得。
3.根据权利要求2所述的一种一次性降解复合布,其特征在于,所述本白降解膜通过如下方法制备:
(1)全降解原料TA-1102在170~190℃的温度塑化;
(2)将塑化后的材料经T型模头在180~200℃的温度下双层共挤挤出;
(3)通过光辊与液体硅胶辊对挤出的降解膜进行热压、冷却和定型,制得22~26g/m2本白降解膜。
4.根据权利要求3所述的一种一次性降解复合布,其特征在于,所述步骤(1)的塑化温度为180℃。
5.根据权利要求4所述的一种一次性降解复合布,其特征在于,所述步骤(2)中T型180℃模头的1区~11区温度为190℃。
6.根据权利要求5所述的一种一次性降解复合布,其特征在于,所述步骤(3)中液体硅胶辊压力为2~4MPa。
7.一种如权利要求1所述的一次性降解复合布的制备方法,其特征在于,其包括如下步骤:
(a)将22~26g/m2本白降解膜以及30g/m2白降解无纺布输入喷胶机;
(b)喷胶机按照2.5g/m2的喷胶量喷胶后,将本白降解膜和白降解无纺布胶复合在一起,得到一次性降解复合布。
8.根据权利要求7所述的制备方法,其特征在于,所述喷胶机的预热区温度为140℃。
9.根据权利要求8所述的制备方法,其特征在于,所述喷胶机的胶枪区温度为175℃。
10.根据权利要求9所述的制备方法,其特征在于,所述喷胶机的主牵引辊压力为0.4~1.0MPa,辅牵引辊压力为0.1~0.8MPa。
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